(PHP 5 >= 5.3.0, PHP 7)
pcntl_sigwaitinfo — Waits for signals
pcntl_sigwaitinfo ( array $set [, array &$siginfo ] ) : int
The pcntl_sigwaitinfo() function suspends execution of the calling script until one of the signals given in set
are delivered. If one of the signal is already pending (e.g. blocked by pcntl_sigprocmask()), pcntl_sigwaitinfo() will return immediately.
set
Array of signals to wait for.
siginfo
The siginfo
parameter is set to an array containing information about the signal.
The following elements are set for all signals:
The following elements may be set for the SIGCHLD
signal:
The following elements may be set for the SIGILL
, SIGFPE
, SIGSEGV
and SIGBUS
signals:
The following element may be set for the SIGPOLL
signal:
On success, pcntl_sigwaitinfo() returns a signal number.
Example #1 pcntl_sigwaitinfo() example
<?php echo "Blocking SIGHUP signal\n"; pcntl_sigprocmask(SIG_BLOCK, array(SIGHUP)); echo "Sending SIGHUP to self\n"; posix_kill(posix_getpid(), SIGHUP); echo "Waiting for signals\n"; $info = array(); pcntl_sigwaitinfo(array(SIGHUP), $info); ?>
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https://www.php.net/manual/en/function.pcntl-sigwaitinfo.php